hi,, i hav'nt sex since 3 years more,,, then i slept my boyfriend after 5  days of my period,. i got a mild bleeding after thats moment for 2 days,on the 3rd day it was fresh red blood.im not using contraseptives neighther condums to my partner,. it is danger for me,whats possible can be cause or happends for it, please anyone can advice me what im going to do,im very worried right now.

                     thanks a lots